# Client users

You can represent individuals under a given `Client` with
[`users`](https://developers.google.com/authorized-buyers/apis/marketplace/reference/rest/v1/buyers.clients.users).

You can implement client users to manage individual access to the
[Authorized Buyers
UI](https://realtimebidding.google.com/#MARKETPLACE/MarketplaceDiscoveryPlace:marketplaceDiscovery),
and to retrieve information for negotiations.

An individual user is represented by a
[`ClientUser`](https://developers.google.com/authorized-buyers/apis/marketplace/reference/rest/v1/buyers.clients.users#resource:-clientuser).

A client user can only use features that their parent `Client` has access to. A
client user who has accepted your invitation can access the Authorized Buyers
Marketplace UI while signed into the Google account connected to their `email`.

You can't modify the `email` of a `ClientUser` after creation. If you
need to change an email, we recommend [removing](https://developers.google.com/authorized-buyers/apis/guides/marketplace/manage-client-users#delete)
and [readding](https://developers.google.com/authorized-buyers/apis/guides/marketplace/manage-client-users#create)
the `ClientUser`.